82412991 has 16 divisors (see below), whose sum is σ = 129276000. Its totient is φ = 51709824.

The previous prime is 82412987. The next prime is 82413007. The reversal of 82412991 is 19921428.

It is not a de Polignac number, because 82412991 - 2² = 82412987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82412921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89316 + ... + 90233.

It is an arithmetic number, because the mean of its divisors is an integer number (8079750).

Almost surely, 2^82412991 is an apocalyptic number.

82412991 is a deficient number, since it is larger than the sum of its proper divisors (46863009).

82412991 is a wasteful number, since it uses less digits than its factorization.

82412991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179575 (or 179569 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 82412991 is about 9078.1601109476. The cubic root of 82412991 is about 435.1762900207.

The spelling of 82412991 in words is "eighty-two million, four hundred twelve thousand, nine hundred ninety-one".